Safety attachment for power-presses.



R. HOELEMANN.

SAFETY ATTACHMENT FOR POWER PRESSES.

APPLICATION TILED NOV. 1, 1913.

Patented Jul 7, 1914.

RICHARD HOELEMANN, F BROOKLYN, NEW YORK.

SAFETY ATTACHMENT FOR POWER-PRESSES.

Specification of Letters Eatent.

Patented July if, 191%.,

Application filed November 1, 191a Serial No. 798.639.

To all whom/2'15 may concern:

Be it known that I, RICHARD a citizen of the United States, and residingat Brooklyn, Greater Ridgewood, in the 5 county of Kings and State ofNew York, have invented certain new and useful Improvements in SafetyAttachments for Power-Presses, of which the following is aspecification; such as will enable those skilled in the art to which itappertains to make and use the same. i

This invention relates to ordinary power presses and particularly tosafety devices for ap aratus of this class, and the object thereo is toprovide an ordinary power press with an improved attachment desi 'ned toprevent injury to the fingers or han s of an operator by reason ofcarelessness or indifference in the operation of the machine. Theinvention is fully disclosed in the following specification of which theaccompanying drawing forms a part, in which the separate parts of myimprovement are designated by suitable reference characters in each ofthe views, and in which HOELEMANN,

Figure 1 1s a side View of a part of a power press showing myimprovement applied thereto; Fig. 2 a cross section on the line 2-2 ofFig. 1; Fig. 3 a partial section 011 the line 3-3 of Fig. 1, and on anenlarged scale, and; Fig. 4 a partial section on the line 4-4: of Fig.2, and on an enlarged scale.

In the drawing forming part of this specification, I have shown the mainparts of the frame of an ordinary powerpress com-c prising a front tableportion a, vertical and parallel side back frame members of, the die bedZ, the vertically movable plunger 0 and the die cl connected with saidplunger. I have also indicated at e, the clutch head at the top of themachine, said clutch being detached in the accompanying drawing, and atI have shown the usual vertically movable clutch rod which, in the useof the machine, is operated by a foot lever or pedal, not shown, tothrow the machine into operation, the upper end portion of said clutchrod being shown at f and in engagement with the clutch head 0, all theseparts being of the usual construction, and forming no part of myinvention.

In carrying my invention into effect, I mount in the vertical framemembers a a horizontal shaft 9, one end of which is provided with an armrigidly secured thereto, and secured to t e corresponding frame member ais a bracket arm h having an outwardly curved head if through which. ispassed a vertical! arranged ad usting screw 11. adapted to limit theupward movement of the arm 9 andisecured to said arm g is aspiral-spring g which is secured to the corresponding frame member a atg*, and which serves to raise the arm and to turn the shaft g in thebackward direction, and is secured to the arm 9 by an eye-bolt or screw9 v Mounted on the clutch rod f above and forwardly of the shaft g andrearwardl of the bracket arm h is a split block 11 w ich serves todepress the arm 9 in the downward movement of llhQClLltCh rod 7' and toturn the shaft 9 in a forward direction. Mounted on the shaft I 9between the frame members a? is a split block j having forwardlydirected jaws 9' between which is pivoted an arm Is. In the form ofconstruction shown, a bolt is? is passed through the endof the arm isand through the jaws 1' and one of the jaws 3' and the arm is areprovided respectively, at one side, with jaws 7' and 7c", and set screwsare passed through the jaw 70 and adapted to bear on the jaw 9' and b'adjusting the screws m, the arm A: may e turned vertically on the bolt72 into any desired position and secured therein. In power presses ofthe class to which my invention relates, the die beds 6 are of differentvertical thicknesses, and this renders necessary, thevertical adjustmentof the guard arm or arms so as to accommodate the attachment todifferent presses. The split block f is also provided with projectingjaws j through which are passed bolts 7' and by means of thisconstruction, the block j may be. adjusted longitudinally of the shaft 9and is secured thereto to prevent its rotation thereomby a set screw j"or in any other way.

The forward end of the arm is is provided with a bracket plate 91., towhich is adjustably secured a plate 0 provided witha forwardly directedarm 0 having a loop-shaped front end 0 through which the'die' d, is

adapted to operate. Oneof the parts aka),

preferably 0, is provided with longitudinal slots 29 through which arepassed bolts p by which the parts a and 0 are connected, and by means ofthis construction, the part 0 may be adjusted longitudinally of the partn.

The normal position of the parts, when the machine is not in operation,is that shown in Fig. 1, in which the arms 70 and 0 are raised above thedie bed 6. In the operation of starting the press, the clutch rod 1 isdepressed, in the usual manner, and this throws the arms 70 and 0 intothe position shown in dotted lines in Fig. 1, in which the arm 0 restson the die bed I), and the plunger c operates in the usual manner. Theaccidents hereinbefore referred to usually occur by reason of theoperator carelessly placing his hand or fingers on the die bed 6 at thetime the press is thrown into operation, or by the operator failing toremove his hand or fingers from the die-bed at the time the press isthrown into operation. With my improvement however, the descent of thearms is and 0 on the die bed occurs before the downward movement of theplunger 0, and this warns the operator whose hand or fingers will bestruck by the arm 0 and stops the machine until they are removed fromthe die block.

My invention does not in any way aflect the construction andoperation ofthe press and consists only of the attachment herein shown anddescribed.

My invention is also not limited to any partlcular means for, or methodof connecting the arm 70 with the shaft g, nor of conv necting the arm 0with the arm 70, nor is it necessarily limited to the formation of thearm is and the block j of different parts, nor to the formation of thearms 70 and 0 of different parts, but I prefer to make the arms 70 and 0of different parts so as to provide for the adjustment of the arm 0 andother changes in and modifications of the various parts of my improvedsafety attachment for power. presses, as herein shown and described maybe made, within the scope of the appended claims, without departing fromthe spirit of my invention or sacrificing its advantages.

Having fully described my invention, what I claim as new anddesire tosecure by Letters Patent is 1. In a power press of the usualconstruction and involving the usual pedal operated clutch rod, a safetyattachment comprising a shaft mounted transversely of and rearwardly ofthe die bed of the press, a forwardly directed guard arm connected withsaid shaft, automatic means for turning said shaft so as to raise saidguard arm, and means for turning said shaft to depress said guard armonto the die bed, comprising a stop arm connected with the shaft and apart connected with the clutch rod and operating in connection with saidstop arm, and a stop device connected with the frame for limiting theupward movement of said stop arm and the turning of the shaft toraise/the guard arm.

2. In a power press of the usual construction and involving the usualpedal operated clutch rod, a safety attachment comprising a horizontalshaft mounted rearwardly of the die bed of the press, a forwardlydirected guard arm connected with said shaft and provided at its frontend with a guard, a spring for turning said shaft so as to raise theguard arm, a stop arm connected with said shaft and a stop connectedwith the frame of the press and in connection with which the stop armoperates to limit the said movement of said shaft, and a part connectedwith the clutch rod and operating in connection with said stop armmember to turn said shaft so as to depress said guard arm onto the diebed of the press.

In testimony that I claim the foregoing as my invention I have signed myname in presence of the subscribing witnesses this 31st day of October,1913.

RICHARD HonL'EMANn Witnesses O. MULREANY, S. ANDREWS.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, I). G. P

